如何在没有if条件swift的情况下验证多个值[关闭]

Posted 2023-03-10

【中文标题】如何在没有if条件swift的情况下验证多个值[关闭]

【英文标题】：How to validate multiple values without if condition swift [closed]

【发布时间】：2021-06-01 18:44:37

【问题描述】：

这是在条件语句中的一种可能方式

if let offer = self.offer_visitor_["Offer"],  let video = self.offer_visitor_["VideoReward"],  let bday = self.offer_visitor_["BirthdayReward"],let Promotional = self.offer_visitor_["promotional"]
            
            if !offer.isEmpty && !video.isEmpty && !bday.isEmpty && !Promotional.isEmpty
                return 4
            else if !offer.isEmpty && !bday.isEmpty && !video.isEmpty 
                return 3
            else if !offer.isEmpty && !video.isEmpty && !Promotional.isEmpty 
                return 3
            else if !offer.isEmpty && !bday.isEmpty && !Promotional.isEmpty 
                return 3
            else if !video.isEmpty && !bday.isEmpty && !Promotional.isEmpty 
                return 3
            else if !offer.isEmpty && !video.isEmpty 
                return 2
            else if !offer.isEmpty && !bday.isEmpty 
                return 2
            else if !offer.isEmpty && !Promotional.isEmpty
                return 2
            else if !video.isEmpty && !bday.isEmpty 
                return 2
            else if !video.isEmpty && !Promotional.isEmpty 
                return 2
            else if !bday.isEmpty && !Promotional.isEmpty 
                return 2
            else if !offer.isEmpty 
                return 1
            else if !video.isEmpty 
                return 1
            else if !bday.isEmpty 
                return 1
            else if !Promotional.isEmpty 
                return 1
            else
                UIView.transition(with: self.noHistory_Label!,
                                  duration: 0.35,
                                  options: .transitionCrossDissolve,
                                  animations:  [weak self] in
                                        self?.noHistory_Label?.text = UserDefaults.language == "ar" ? ArabicLanguageFile.NoOffers : EnglishLanguageFile.NoOffers
                                  , completion: nil)
                return 0
            
        else
            UIView.transition(with: self.noHistory_Label!,
                              duration: 1,
                              options: .transitionCrossDissolve,
                              animations:  [weak self] in
                                self?.noHistory_Label?.text = UserDefaults.language == "ar" ? ArabicLanguageFile.NoOffers : EnglishLanguageFile.NoOffers
                , completion: nil)
            return 0
        

如果动态值是这种使用方式 类似的东西

let count = [arrayData1["Available Offers"]?.count != 0, arrayData1["Redeemtion Offers"]?.count != 0, arrayData1["Redeemtion Vouchers"]?.count != 0, self .arrayData1["Available Vouchers"]?.count != 0].filter $0 == true .count

地图 过滤

谢谢

【问题讨论】：

返回的这些神奇数字是什么？

你要数什么？

【参考方案1】：

据我了解，这只是一种非常复杂的方法来计算这 4 件事中有多少不是空的。看起来很简单：

let emptyObjectCount = [offer, video, bday, promotional]
    .filter  !$0.isEmpty 
    .count

虽然这些变量名没有意义，但你应该改进它们。

【讨论】：

也许算不！空集合??‍♂️